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Definition:

CIE1931 (x, y)
CIE1976 (u’,v’)

Color as described in the CIE1931 system can be plotted on a chromaticity diagram, usually a plot of the chromaticity coordinates x and y. Another popular color system is the CIE1976 uniform-chromaticity scale which advantage is that the distance between points is approximately proportional to the perceived color difference, something definitely not true in the CIE1931 diagram.

Explain:

xy 01

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【Lighting Knowledge】Chromaticity Coordination
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